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taurus [48]
3 years ago
15

What is the value of k for which the following equation has one solution?|14+ 7x| - 15 = k​

Mathematics
1 answer:
erik [133]3 years ago
3 0

Answer:

7x-1

Step-by-step explanation:

14 + 7x - 15 = k

7x - 1 = k

Finding x,

14 + 7x - 15 = k

=> 14 + 7x = k + 15

=> 7x = k + 15 - 14

=> x = (k + 1)/7

So, 7 * (k+1)/7 - 1 = k

k + 1 - 1 = k

=> k = k

So the answer is true that 7x - 1

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valentinak56 [21]

Answer: See explanation

Step-by-step explanation:

a. Marisa drives 112 miles in 1 hour and 45 minutes, which means her speed is 64 miles per hour.

Speed = Distance / Time

= 112 / 1 45/60

= 112 / 1 3/4

= 112 × 4/7

= 64 miles per hour.

TRUE

b . If 6 pens cost $7.74, then 7 pens cost $9.03.

Cost of one pen = $7.74/6 = $1.29

Cost of 7 pens = $1.29 × 7 = $9.03

TRUE

c. If Raymond drives at a speed of 57 miles per hour, then it takes him 4 hours and 10 minutes to drive 256.5 miles.

Speed = Distance / Time

Speed = 256.5 / 57 = 4.5 = 4 hours 30 minutes

FALSE

d. If 17 identical cans of soup cost $38.59, then 3 of the cans must cost $6.81.

Cost of one can = $38.59 / 17 = $2.27

Cost of 3 cans = $2.27 × 3 = $6.81

TRUE

e. Mr. Mayes buys two dozen eggs for $8.40, which means that he pays 70 cents per egg.

A dozen = 12

2 dozens = 12 × 2 = 24

Cost of one egg = $8.40 / 24 = 0.35 = 35 cents

FALSE

8 0
3 years ago
For every 5 chocolate cones sold, 7 vanilla cones are sold. On Monday, 70 chocolate cones were sold. How many cones were sold IN
FromTheMoon [43]

Answer: 168

Step-by-step explanation: 70/5=14. 14x7=98.  70+98=168.

5 0
3 years ago
Evaluate the expression 7x to the power of 2y, when x = 5 and y = 3.
Stells [14]
The answer is 210 hope this helps
6 0
3 years ago
Which is an equation?
liq [111]

Answer:

c

Step-by-step explanation:

because it has an equal sign

3 0
2 years ago
Read 2 more answers
Michael got a loan for the Playstation 5. His loan was $600. At a 3.75% interest rate he had to pay $7.50 in interest. How long
Semmy [17]

Answer:

4 mo.

Step-by-step explanation:

I = PRT      P = 600    R = .0375    I = 7.50

7.50 = 600(.0375)T

7.5 = 22.5T

T = 7.5/22.5 = 1/3 yr = 4 mo.

6 0
2 years ago
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